The mesophyll of the leaf has which of the following characteristics?
A. It is located between the leaf veins.
B. It is exposed to direct sunlight.
C. It is mostly along the edges of the leaf.
D. It is sometimes found in roots or stems.
E. It is made up of palisade and spongy parenchyma cells.
E. It is made up of palisade and spongy parenchyma cells.
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Compare and contrast the mechanisms of the sodium-potassium pump and glucose-sodium cotransport
systems. What will be an ideal response?
The hepatic portal system is a special blood circuit between the ____ and ____
a. liver; spleen b. kidney; liver c. liver; intestine d. kidney; heart e. spleen; heart
The northern elephant seal was hunted almost to extinction during the 18th and 19th centuries. Less than 100 seals were left to contribute to the gene pool of their future generations. Since the early 20th century, the elephant seals have been protected by law in both the U.S. and Mexico. Over 100,000 seals now inhabit the western shores of North America, all related to the small population that survived the slaughter of hunters.Scientists fear the elephant seals may be more susceptible to disease and pollution due to
A. founder effect. B. disruptive selection. C. heterozygous advantage. D. bottleneck effect.
A mushroom belongs to which kingdom ?
a. Protist b. Fungi c. Plant d. Animal